Filter system



FIG. 1 is front elevational view of the filter system showing our new design;

FIG. 2 is a right side elevational view of the filter system of FIG. 1;

FIG. 3 is a rear elevational view of the filter system of FIGS. 1 and 2;

FIG. 4 is a left side elevational view of the filter system of FIGS. 1-3;

FIG. 5 is a top plan view of the filter system of FIGS. 1-4;

FIG. 6 is a bottom plan view of the filter system of FIGS. 1-5; and,

FIG. 7 is a perspective view of the filter system of FIGS. 1-6.

The broken line showing is included for the purpose of illustrating and forms no part of the claimed design. 

CLAIM The ornamental design for a filter system, as shown and described. 